O7/Core/Src/i2c.c

/**
  ******************************************************************************
  * @file    i2c.c
  * @author  Yunhorn (r) Technology Limited Application Team
  * @brief   This file provides code for the configuration
  *          of the I2C instances.
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2023 Yunhorn Technology Limited.
  * Copyright (c) 2023 Shenzhen Yunhorn Technology Co., Ltd.
  *
  * This software component is licensed by ST under BSD 3-Clause license,
  * the "License"; You may not use this file except in compliance with the
  * License. You may obtain a copy of the License at:
  *                        opensource.org/licenses/BSD-3-Clause
  *
  ******************************************************************************
  */

/* Includes ------------------------------------------------------------------*/
#include "i2c.h"
#include "main.h"
#include "yunhorn_sts_prd_conf.h"
/* USER CODE BEGIN 0 */
I2C_HandleTypeDef hi2c2;
DMA_HandleTypeDef hdma_i2c2_rx;
DMA_HandleTypeDef hdma_i2c2_tx;
/* USER CODE END 0 */

/* I2C2 init function */
/**
  * @brief I2C2 Initialization Function
  * @param None
  * @retval None
  */
void MX_I2C2_Init(void)
{

  /* USER CODE BEGIN I2C2_Init 0 */

  /* USER CODE END I2C2_Init 0 */

  /* USER CODE BEGIN I2C2_Init 1 */

  /* USER CODE END I2C2_Init 1 */
  hi2c2.Instance = I2C2;
  //hi2c2.Init.Timing = 0x20303E5D; //0x2010091A = 400K Fast Mode, 0x20303E5D, 100K Standard mode, 0x20000209 Fast Mode Plus, 1Mbps
  hi2c2.Init.Timing = I2C2_STANDARD_100K;	//2024-07-12 UPDATE
  hi2c2.Init.OwnAddress1 = 0;
  hi2c2.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
  hi2c2.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
  hi2c2.Init.OwnAddress2 = 0;
  hi2c2.Init.OwnAddress2Masks = I2C_OA2_NOMASK;
  hi2c2.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
  hi2c2.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
  if (HAL_I2C_Init(&hi2c2) != HAL_OK)
  {
    Error_Handler();
  }

  /** Configure Analogue filter
  */
  if (HAL_I2CEx_ConfigAnalogFilter(&hi2c2, I2C_ANALOGFILTER_ENABLE) != HAL_OK)
  {
    Error_Handler();
  }
  /** Configure Digital filter
  */
  if (HAL_I2CEx_ConfigDigitalFilter(&hi2c2, 0) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN I2C2_Init 2 */

  /* USER CODE END I2C2_Init 2 */

}

void HAL_I2C_MspInit(I2C_HandleTypeDef* i2cHandle)
{

  GPIO_InitTypeDef GPIO_InitStruct = {0};
  RCC_PeriphCLKInitTypeDef PeriphClkInitStruct = {0};
  if(i2cHandle->Instance==I2C2)
  {
  /* USER CODE BEGIN I2C2_MspInit 0 */

  /* USER CODE END I2C2_MspInit 0 */

  /** Initializes the peripherals clocks
    */
	      PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_I2C2;
	      PeriphClkInitStruct.I2c2ClockSelection = RCC_I2C2CLKSOURCE_PCLK1;
	      if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)
	      {
	        Error_Handler();
	      }


    __HAL_RCC_GPIOA_CLK_ENABLE();
    /**I2C2 GPIO Configuration
    PA12     ------> I2C2_SCL
    PA11     ------> I2C2_SDA
    */
    GPIO_InitStruct.Pin = GPIO_PIN_12|GPIO_PIN_11;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
    GPIO_InitStruct.Pull = GPIO_NOPULL; 		//GPIO_PULLUP;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
    GPIO_InitStruct.Alternate = GPIO_AF4_I2C2;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

    /* I2C2 clock enable */
    __HAL_RCC_I2C2_CLK_ENABLE();

    /* I2C2 DMA Init */
    /* I2C2_RX Init */
    hdma_i2c2_rx.Instance = DMA1_Channel4;
    hdma_i2c2_rx.Init.Request = DMA_REQUEST_I2C2_RX;
    hdma_i2c2_rx.Init.Direction = DMA_PERIPH_TO_MEMORY;
    hdma_i2c2_rx.Init.PeriphInc = DMA_PINC_DISABLE;
    hdma_i2c2_rx.Init.MemInc = DMA_MINC_ENABLE;
    hdma_i2c2_rx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
    hdma_i2c2_rx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
    hdma_i2c2_rx.Init.Mode = DMA_NORMAL;
    hdma_i2c2_rx.Init.Priority = DMA_PRIORITY_LOW;
    if (HAL_DMA_Init(&hdma_i2c2_rx) != HAL_OK)
    {
      Error_Handler();
    }
#ifdef STM32WL55xx
    if (HAL_DMA_ConfigChannelAttributes(&hdma_i2c2_rx, DMA_CHANNEL_NPRIV) != HAL_OK)
    {
      Error_Handler();
    }
#endif
    __HAL_LINKDMA(i2cHandle,hdmarx,hdma_i2c2_rx);

    /* I2C2_TX Init */
    hdma_i2c2_tx.Instance = DMA1_Channel5;
    hdma_i2c2_tx.Init.Request = DMA_REQUEST_I2C2_TX;
    hdma_i2c2_tx.Init.Direction = DMA_MEMORY_TO_PERIPH;
    hdma_i2c2_tx.Init.PeriphInc = DMA_PINC_DISABLE;
    hdma_i2c2_tx.Init.MemInc = DMA_MINC_ENABLE;
    hdma_i2c2_tx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
    hdma_i2c2_tx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
    hdma_i2c2_tx.Init.Mode = DMA_NORMAL;
    hdma_i2c2_tx.Init.Priority = DMA_PRIORITY_LOW;
    if (HAL_DMA_Init(&hdma_i2c2_tx) != HAL_OK)
    {
      Error_Handler();
    }
#ifdef STM32WL55xx
    if (HAL_DMA_ConfigChannelAttributes(&hdma_i2c2_tx, DMA_CHANNEL_NPRIV) != HAL_OK)
    {
      Error_Handler();
    }
#endif
    __HAL_LINKDMA(i2cHandle,hdmatx,hdma_i2c2_tx);

  /* USER CODE BEGIN I2C2_MspInit 1 */

  /* USER CODE END I2C2_MspInit 1 */
  }
}

void HAL_I2C_MspDeInit(I2C_HandleTypeDef* i2cHandle)
{

  if(i2cHandle->Instance==I2C2)
  {
  /* USER CODE BEGIN I2C2_MspDeInit 0 */

  /* USER CODE END I2C2_MspDeInit 0 */
    /* Peripheral clock disable */
    __HAL_RCC_I2C2_CLK_DISABLE();

    /**I2C2 GPIO Configuration
    PA12     ------> I2C2_SCL
    PA11     ------> I2C2_SDA
    */
    HAL_GPIO_DeInit(GPIOA, GPIO_PIN_12);

    HAL_GPIO_DeInit(GPIOA, GPIO_PIN_11);

    /* I2C2 DMA DeInit */
    HAL_DMA_DeInit(i2cHandle->hdmarx);
    HAL_DMA_DeInit(i2cHandle->hdmatx);

  /* USER CODE BEGIN I2C2_MspDeInit 1 */

  /* USER CODE END I2C2_MspDeInit 1 */
  }
}

/* USER CODE BEGIN 1 */

/* USER CODE END 1 */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/